Process of forming tacks.



No. 737,206. v PATIENITEDYAUG. 25, 1903.

G. J. GAPEWBLL.

PROCESS OF FORMING T AGKS.

APPLICATION FILED OOT.1, 1901.

'10 MODEL.

I II III 11111111! 1 IIIIIIIIIIIIII-IIIIIIIII m canton Wane/was I g I@Mu Q UNITED STATES iatented August 25, 1903.

"PATENT. OFFICE.

PROCE SS OF FORMING TACKS.

SPECIFICATIONformingpart of Letters Patent No. 737,206, dated August 25,1903.

Application filed October 1, 1901. Serial No- 77,23l. (No model.)

To all whom it may concern: I

Be it known that LG CRGE J. CAPEWELL,

a citizen of the United States, residing at Hartford, in the county ofHartford and State of Connecticut, have invented certain new and usefulImprovements in Processes for Forming Tacks, of which the following is aspecification. j y

This invention relates to a process for forming a tack from two piecesof metal.

The object of the invention is to provide a simple process for making astrong tack/with a large solid head out of a minimum amount of metal. I

The process that is illustrated by the accompanying drawings produces atack that has a solid head which is formed from two different pieces ofmetal that arepressed together with greatf0rce,so as tobepracticallyhomogeneous and integral with the pointed shank.

Figure 1 is a'side view of the part that is used as the base of theimproved tack. Fig. 2 is a side View of a cup that is used to form theexterior ofthe head of the finished tack.

Fig. 3 is a section showing the base placed in the cup, the first-stepin thepro'cess of forming the improved tack. Fig. 4'is a plan ofthe.parts shown in 3. Fig. 5 is a section showing the edge of the cup foldeddown upon the enlarged part of the base, the second step in the processof forming my tack. Fig. 6 is a plan of the parts shown in Fig. 5.

then these parts are subjected to the action of dies, which fold theWall. of the cup inwardly and downwardly upon the bottomface of theenlargement. The cup is somewhat larger in diameter than the diameter ofthe enlarged end of the shank, and it is of such depth that when thewall is folded down it will lap upon the bottom face of the enlargementpart way.

Fig. 7 is p a section of a finished button-fastener tack.

7 up to the shank. The parts are then subjected tothe action of powerfuldies, and the enlarged partof the shank and the inclosing cup are swageduntil they are substantially homogeneous. v the cup that when the partsare swaged together all openings and crevices are filled and the inneredge flows inwardly up to the shank while the outer edge spreadsoutwardly, was to form an enlarged head. The finished head Thereis suchan amount of metal in may be swaged to any desired shape, either fiat,as shown in Fig. 7, or curved, as in Fig.

- 9,and may be of any diameter. tack may be j formed in this manner.from a small amount of metal with a large head which is particujlarlysolid, for it is practically homogeneous "and integral with the shank,so that it may used for the shank,which is desirable formany purposes.

Thistack forms a particularly desirable button-fastener tack, althoughit is very serviceable in the shape of a trunk-tack, a leathertack, oran upholsterers tack, which tacks have large heads and are subjected toviolent usage and which usually have heads of a metal superior to themetal of the shanks.

I claim as my invention The process of forming a large-headed tack-Which consists in placing an integral enlarged end of a'pointed metallicshank into a metallic cup, folding the walls of the cup about the underside of the enlarged endof theshank and swaging the folded cup and theenlarged end of the shank and causing the metalof the shank end to flowoutwardly from the shank and the metal of the cup to flow inwardlytoward and outwardly from the shank. until the metals becomesubstantially'hoinogena oils and form a large solid head that isprac-Cally integral with the shank, substantially as specified. g

GEORGE J: APEW'ELL.

WVitnesses:

H. R. WILLIAMS, V. R. HCLCCMB.

